'Unlistenable' early digital recordings?

Obviously, today’s engineering of digital masters is far superior than the early years. Some say that many CD’s from the early years are ’unlistenable’. I used to agree. But, over the past couple of years, I’ve spent considerable effort to clean up the power to each of my digital components. Now, early CD’s are quite listenable. They might not be ’audiophile quality’ but the music comes across just fine. No more digital nasties. No more glare or etch in the HF. No more excessive boominess in the LF. I’m definitely a clean power convert. So much so, that I recommend cleaning up the power before upgrading to a new DAC. What’s your experience?